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<br />n <br />u <br />:::i;.........' ....~:~._,.~:.ir::': .. .,._....... ,.a_e~ .. .:a __.t'~ ~ontt0l D1:i5iOC <br />iiaciona_e - gage _. Permit :;o. Cu-003bu?4 <br />APPENDIX A <br />Water quality standard (WQS) based effluent limitations are calculated using <br />the following mass balance formula: <br />EL ° WQS (Q7-10 + QEFF) - (Q7-10 X CAMB) <br />QEFF <br />Where: <br />EL Calculated effluent limitation (mg/1) <br />WQS Applicable water quality standard (mg/1) <br />Q7-10 Receiving water 7-day, 10-year low flow (140 cfs) <br />QEFF Maximum effluent flow (0.123 cfs) <br />Cog Ambient instream concentration (mg/1)* <br />Following are some specific calculations: <br />Total Recoverable Iron: <br />EL ° 2.3 (140 + 0.123) ° 2,620 mg/1 <br />0.123 <br />Total Recoverable Manganese: <br />Fy ° 1.0 (140 + 0.123) ° 1,139 mg/1 <br />0.123 <br />Total Pecoverable Silver: <br />Fy ° 0.0001 (140 + 0.123) 0.114 mg/1 <br />0.123 <br />* For these calculations, ambient data is disregarded. <br />